1.Two atoms are said to be isotopes if
A.They have same atomic number but different mass number
B.They have the same number of neutrons but different mass numbers
C.The sum of the number of protons and neutrons in them is equal, but the number of protons is different
D.They have the same number of neutrons but different radioactive moment methods
2.“Azadi@75 – New Urban India” – the Urban conclave was inaugurated in which city?
3.A man and 2 boys can finish a job in 5 days and the same job can be done in 3 days by 2 men and a boy. How many days does it take 2 men and boys each to finish the job?
4.In a line of 30 students, A is 7th from the left and B is 12th from the right. How many persons are there between A and B?
5.The best synonym for prudence?